Tonight I was trying to email out a PDF to a reviewer.  I got this error... 
  
This message was created automatically by mail delivery software. 
  
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: 
  
  patrik@genetics.med.harvard.edu 
    This message has been rejected because it has 
    a potentially executable attachment "Kestaal.com 
    This form of attachment has been used by 
    recent viruses or other malware. 
    If you meant to send this file then please 
    package it up as a zip file and resend it. 
  
  
Weird I thought... 
So I zipped it and got the same error... 
  
So I went on to the NEXT reviewer. 
  
This message was created automatically by mail delivery software. 
  
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: 
  
  cgath@insight.rr.com 
    This message has been rejected because it has 
    a potentially executable attachment "Kestaal.com 
    This form of attachment has been used by 
    recent viruses or other malware. 
    If you meant to send this file then please 
    package it up as a zip file and resend it. 
  
  
Same thing!  How odd I thought!  Well, it must be me... 
  
This message was created automatically by mail delivery software. 
  
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: 
  
  drewconrad@kestaal.com 
    This message has been rejected because it has 
    a potentially executable attachment "Kestaal.com 
    This form of attachment has been used by 
    recent viruses or other malware. 
    If you meant to send this file then please 
    package it up as a zip file and resend it. 
  
  
The only thing I can find on PDF viruses is: 
  
Security experts have found the first virus able to propagate through Adobe's encrypted portable document format (PDF) files, a format once thought to be virtually impenetrable.  
Named Peachy by experts at Web security firm McAfee on Tuesday, the email virus hides itself in PDF files and infects other computer systems by sending the file as an attachment through the Microsoft Outlook email program.  
The virus exploits a feature in Acrobat that combines other files with the PDF code. The virus is located in visual basic script contained in the PDF file and is launched when a user clicks on a peach icon located within the document.  
The virus travels in emails with random subject lines along with PDF attachments named "find.pdf," "peach.pdf," "find the peach.pdf," "find_the_peach.pdf," "joke.pdf," or "search.pdf," according to McAfee.  
An Argentine man with the handle Zulu claims to have written the virus in multiple postings on the Web. In one posting he refers to the virus as "OUTLOOK.PDFWorm" and says the virus was "designed to be proof of concept," demonstrating that PDF files are not as safe as previously thought.  
Although experts say that Peachy hasn't caused any damage, and isn't expected to, the virus has raised concerns about PDF, which in the past has been considered to be a very secure file format due to its use of encryption.  
McAfee says it will release a software update next week that can detect the Peachy virus.  
Posted August 8, 2001 
  
  
That of course is from... 3 YEARS ago! 
  
I would appreicate if someone can give me a hand here.  As I run a PDF business, this is pretty important to me. 
  
Thanks all! 
  
Drew Conrad 
kestaal.com